v3.25.2
Stockholders' Equity - Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Other Comprehensive Income (Loss)        
Other comprehensive income (loss), pre-tax $ 79.9 $ (192.0) $ 613.2 $ (38.8)
Other comprehensive income (loss), tax (2.9) 36.5 (104.1) (29.3)
Other comprehensive income (loss) 77.0 (155.5) 509.1 (68.1)
Net unrealized gains (losses) on available-for-sale securities including NCI        
Other Comprehensive Income (Loss)        
Other comprehensive income (loss) before reclassifications, pre-tax 273.5 (720.6) 940.3 (1,228.3)
Adjustments for assumed changes in amortization patterns, pre-tax (0.1) 4.9 (0.5) 4.7
Adjustments for assumed changes in policyholder liabilities, pre-tax (2.6) 2.5 15.7 10.7
Other comprehensive income (loss), pre-tax 315.3 (669.4) 1,062.5 (1,125.6)
Other comprehensive income (loss) before reclassifications, tax (57.6) 159.5 (198.5) 267.8
Reclassification from accumulated other comprehensive income, tax (9.5) (9.3) (22.6) (18.3)
Adjustments for assumed changes in amortization patterns, tax 0.1 (1.0) 0.2 (1.0)
Adjustments for assumed changes in policyholder liabilities, tax 0.6 (0.6) (3.3) (2.3)
Other comprehensive income (loss), tax (66.4) 148.6 (224.2) 246.2
Other comprehensive income (loss) before reclassifications, after-tax 215.9 (561.1) 741.8 (960.5)
Reclassification from accumulated other comprehensive income, after-tax 35.0 34.5 84.4 69.0
Adjustments for assumed changes in amortization patterns, after-tax   3.9 (0.3) 3.7
Adjustments for assumed changes in policyholder liabilities, after-tax (2.0) 1.9 12.4 8.4
Other comprehensive income (loss) 248.9 (520.8) 838.3 (879.4)
Net unrealized gains (losses) on available-for-sale securities including NCI | Net realized capital gains (losses)        
Other Comprehensive Income (Loss)        
Reclassification from accumulated other comprehensive income, pre-tax 44.5 43.8 107.0 87.3
Net unrealized gains (losses) on derivative instruments including NCI        
Other Comprehensive Income (Loss)        
Other comprehensive income (loss) before reclassifications, pre-tax (208.0) 31.4 (189.5) 54.5
Reclassification from accumulated other comprehensive income, pre-tax (0.6) (0.9) (1.2) (1.8)
Adjustments for assumed changes in amortization patterns, pre-tax 0.1 (0.1) 0.1 (0.2)
Other comprehensive income (loss), pre-tax (208.5) 30.4 (190.6) 52.5
Other comprehensive income (loss) before reclassifications, tax 43.6 (6.6) 39.7 (11.4)
Reclassification from accumulated other comprehensive income, tax 0.2 0.2 0.3 0.4
Other comprehensive income (loss), tax 43.8 (6.4) 40.0 (11.0)
Other comprehensive income (loss) before reclassifications, after-tax (164.4) 24.8 (149.8) 43.1
Reclassification from accumulated other comprehensive income, after-tax (0.4) (0.7) (0.9) (1.4)
Adjustments for assumed changes in amortization patterns, after-tax 0.1 (0.1) 0.1 (0.2)
Other comprehensive income (loss) (164.7) 24.0 (150.6) 41.5
Liability for future policy benefits discount rate remeasurement gain (loss)        
Other Comprehensive Income (Loss)        
Other comprehensive income (loss), pre-tax (107.2) 501.9 (419.6) 1,212.1
Other comprehensive income (loss), tax 24.7 (108.4) 87.3 (263.9)
Other comprehensive income (loss) (82.5) 393.5 (332.3) 948.2
Market risk benefit nonperformance risk remeasurement gain(loss)        
Other Comprehensive Income (Loss)        
Other comprehensive income (loss), pre-tax (0.5) 1.4 2.2 (9.6)
Other comprehensive income (loss), tax 0.1 (0.3) (0.5) 2.0
Other comprehensive income (loss) (0.4) 1.1 1.7 (7.6)
Foreign currency translation adjustment including NCI        
Other Comprehensive Income (Loss)        
Other comprehensive income (loss), pre-tax 89.6 (58.6) 163.7 (175.3)
Other comprehensive income (loss), tax (7.3) 3.5 (8.0) (0.8)
Other comprehensive income (loss) 82.3 (55.1) 155.7 (176.1)
Unrecognized postretirement benefit obligation including NCI        
Other Comprehensive Income (Loss)        
Other comprehensive income (loss) before reclassifications, pre-tax (13.6) (3.0) (13.6) (3.0)
Other comprehensive income (loss), pre-tax (8.8) 2.3 (5.0) 7.1
Other comprehensive income (loss) before reclassifications, tax 3.5 0.8 3.5 0.8
Reclassification from accumulated other comprehensive income, tax (1.3) (1.3) (2.2) (2.6)
Other comprehensive income (loss), tax 2.2 (0.5) 1.3 (1.8)
Other comprehensive income (loss) before reclassifications, after-tax (10.1) (2.2) (10.1) (2.2)
Reclassification from accumulated other comprehensive income, after-tax 3.5 4.0 6.4 7.5
Other comprehensive income (loss) (6.6) 1.8 (3.7) 5.3
Unrecognized postretirement benefit obligation including NCI | Operating expense        
Other Comprehensive Income (Loss)        
Reclassification from accumulated other comprehensive income, pre-tax $ 4.8 $ 5.3 $ 8.6 $ 10.1